> ## Documentation Index > Fetch the complete documentation index at: https://docs.guiji.cn/llms.txt > Use this file to discover all available pages before exploring further. # Overview ## Overview image.png The Conversational Video Interface (CVI) is an end-to-end pipeline for creating real-time multimodal video conversations with a replica that can see, hear, and respond similarly to how a human would. Developers can deploy video AI agents in minutes using CVI. CVI is the world's fastest interface of its kind, allowing you to put a human face and conversational ability to your AI agent or personality. With CVI, you can achieve utterance-to-utterance latency with SLAs as fast as under 1 second, which is the full roundtrip time for a participant to say something and for the replica to speak back. CVI provides a complete pipeline to have a conversation while also allowing you to customize and plug in your existing components where necessary. ## Key Features ## Face-to-face interactions The first interface that speaks our language. CVI is multimodal and understands and uses facial expressions, body language, and has natural conversational awareness including interrupts and turn-taking. ## World's lowest latency The world's fastest interface of its kind, with SLAs as fast as under 1s latency utterance-to-utterance. ## End-to-end solution CVI provides a turn-key solution, delivering all the components to easily deploy AI video agents without having to worry about WebRTC, ASR, or anything else. ## Focused on naturalness Easily create high-quality AI replicas of you or your customers, powered by our state-of-the-art replica models. ## Face-to-face interactions The first interface that speaks our language. CVI is multimodal and understands and uses facial expressions, body language, and has natural conversational awareness including interrupts and turn-taking. ## World's lowest latency The world's fastest interface of its kind, with SLAs as fast as under 1s latency utterance-to-utterance. ## End-to-end solution CVI provides a turn-key solution, delivering all the components to easily deploy AI video agents without having to worry about WebRTC, ASR, or anything else. ## Focused on naturalness Easily create high-quality AI replicas of you or your customers, powered by our state-of-the-art replica models. ## What does a conversation with CVI look like? ### Here's a sample: [View attachment "conversationdemo.png.mp4"](https://alidocs.dingtalk.com/document/preview?chInfo=im\&cid=63008155837\&dentryKey=GYja4bXQUWqvXZJ8\&docKey=ybEnB54D5WNd3lP1\&dontjump=true\&iframeQuery=anchorId%3DX02m9ievobkstzq0sv5fr\&type=d\&utm_medium=im_card\&utm_source=im) ### Try it out! You can try chatting with Elara on our website to get a taste of what a conversation with CVI looks like.[\*\*Try Out CVI Now!\*\*Note that Elara can see and hear you.](https://duix.com/home) ## What components does CVI provide, and what can I customize? CVI provides a full pipeline allowing you to easily create video conversations. You can immediately jump into a real-time conversation with the generated Session link URL. CVI provides the following layers: * WebRTC/Session link (using Daily) * Speech recognition (ASR), with interrupts, and Semantic/Lexical turn taking, using our model. * Optimized, conversational LLM * Text-to-speech (TTS) You can choose to customize or bring your own layers as well. For example, you can: * Use OpenAI real-time API or other voice-to-voice models * Bring your own LLM/conversation logic or enable function calling for DUIX-optimized LLMs. * Customize the TTS or ASR engine, and turn taking settings * Use text parrot mode to directly drive a replica video. * Directly access the video streams and create a custom UI. ## Key Concepts ### What is a conversation? A conversation is a single 'session' or 'call' with a replica using CVI. When you create a conversation, you receive a Session link URL. This URL provides a full Real-time conversations solution, allowing you to avoid managing WebRTC or websockets. Navigating to this URL lets you chat with your replica. Learn more about [**creating and customizing conversations**](https://platform.duix.com/create). ### What are personas? Personas are the 'character' or 'AI agent personality' and contain all the settings and configuration for that character or agent. For example, you can create a persona for 'Tim the Sales Agent' or 'Rob the Interviewer'. Personas let you customize CVI's layers and prompt the LLM with personality and context. Learn more about [**creating a persona**](https://platform.duix.com/create). ### What are replicas? A replica is a talking-head/avatar of a human containing a voice and face clone, used as the video output layer for CVI. You can use stock replicas from DUIX or create your own with a few minutes of training data. A replica is key for video generation and CVI. Learn how to [**create a great replica**](https://docs.duix.com/sections/introduction). ## Getting Started ### No Code You can easily try out CVI using the template. ### API Quick Start Check out the [**Quick Start Guide**](https://docs.duix.com/sections/introduction) to learn how to use the APIs to create a persona and conversation. Be sure to grab an API key first! Visit duix.com for more information.